diff options
| -rw-r--r-- | ChangeLog | 18 | ||||
| -rw-r--r-- | Makerules | 6 | ||||
| -rw-r--r-- | elf/dl-load.c | 4 | ||||
| -rw-r--r-- | elf/dl-lookup.c | 18 | ||||
| -rw-r--r-- | elf/dl-reloc.c | 4 | ||||
| -rw-r--r-- | elf/do-rel.h | 5 | ||||
| -rw-r--r-- | elf/link.h | 7 | ||||
| -rw-r--r-- | elf/rtld.c | 4 | ||||
| -rw-r--r-- | sysdeps/i386/dl-runtime.c | 2 |
9 files changed, 44 insertions, 24 deletions
@@ -1,5 +1,23 @@ Thu Jun 8 02:50:26 1995 Roland McGrath <roland@churchy.gnu.ai.mit.edu> + * elf/dl-load.c (_dl_map_object): Add MAP_INHERIT flag in mmap + from zero fill. + + * elf/dl-lookup.c (_dl_lookup_symbol): Take new flag arg NOSELF; + if nonzero, don't let *REF satisfy the reference itself. + * elf/link.h (_dl_lookup_symbol): Add new arg NOSELF in decl. + * sysdeps/i386/dl-runtime.c (_dl_runtime_resolve): Pass new arg to + _dl_lookup_symbol. + * elf/do-rel.h (elf_dynamic_do_rel): Pass new second arg of + R->r_offset to RESOLVE callback. + * elf/dl-reloc.c (_dl_relocate_object: resolve): Don't let *REF + satisfy the reference itself if its value equals the reloc's + offset. + + * elf/rtld.c (dl_main): Write a newline in fatal msg. + + * Makerules (lib%.so: lib%_pic.a): Pass $(LDFLAGS.so). + * elf/rtld.c [! NDEBUG] (__assert_perror_fail): New function. * hurd/hurdstartup.c (_hurd_startup): Fancier kludge to guess phdr @@ -355,10 +355,10 @@ ifeq (yes,$(build-shared)) # $(LDLIBS-%.so) may contain -l switches to generate run-time dependencies # on other shared objects. lib%.so: lib%_pic.a - $(LINK.o) -shared -o $@ -Wl,--whole-archive $< \ - $(LDFLAGS-$(notdir $*).so) \ + $(LINK.o) -shared -o $@ \ + $(LDFLAGS.so) $(LDFLAGS-$(notdir $*).so) \ -L$(firstword $(objdir) .) -L$(common-objpfx:%/=%) \ - $(LDLIBS-$(notdir $*).so) + $(LDLIBS-$(notdir $*).so) -Wl,--whole-archive $< \ # Don't try to use -lc when making libc.so itself. # Also omits crti.o and crtn.o, which we do not want diff --git a/elf/dl-load.c b/elf/dl-load.c index c48286f..6cacd3e 100644 --- a/elf/dl-load.c +++ b/elf/dl-load.c @@ -354,8 +354,8 @@ _dl_map_object (struct link_map *loader, const char *name, if (zeroend > zeropage) /* Map the remaining zero pages in from the zero fill FD. */ - mapat = mmap (zeropage, zeroend - zeropage, - prot, MAP_ANON|MAP_PRIVATE|MAP_FIXED, + mapat = mmap (zeropage, zeroend - zeropage, prot, + MAP_ANON|MAP_PRIVATE|MAP_FIXED|MAP_INHERIT, _dl_zerofd, 0); } } diff --git a/elf/dl-lookup.c b/elf/dl-lookup.c index 4d5d795..ca0f034 100644 --- a/elf/dl-lookup.c +++ b/elf/dl-lookup.c @@ -23,13 +23,15 @@ Cambridge, MA 02139, USA. */ #include <assert.h> /* Search loaded objects' symbol tables for a definition of - the symbol UNDEF_NAME. Don't use a PLT defn in UNDEF_MAP, since - that is the object making the reference. */ + the symbol UNDEF_NAME. If NOSELF is nonzero, then *REF + cannot satisfy the reference itself; some different binding + must be found. */ Elf32_Addr _dl_lookup_symbol (const char *undef_name, const Elf32_Sym **ref, struct link_map *symbol_scope, - const char *reference_name) + const char *reference_name, + int noself) { unsigned long int hash = elf_hash (undef_name); struct link_map *map; @@ -57,7 +59,9 @@ _dl_lookup_symbol (const char *undef_name, const Elf32_Sym **ref, { const Elf32_Sym *sym = &symtab[symidx]; - if (sym->st_value == 0) + if (sym->st_value == 0 || /* No value. */ + sym->st_shndx == SHN_UNDEF || /* PLT entry. */ + (noself && sym == *ref)) /* The reference can't define it. */ continue; switch (ELF32_ST_TYPE (sym->st_info)) @@ -71,12 +75,6 @@ _dl_lookup_symbol (const char *undef_name, const Elf32_Sym **ref, continue; } - if (sym->st_shndx == SHN_UNDEF) - /* This is the same symbol we are looking for the value for. - If it is a PLT entry, it will have a value of its own; - but that is not what we are looking for. */ - continue; - if (sym != *ref && strcmp (strtab + sym->st_name, undef_name)) /* Not the symbol we are looking for. */ continue; diff --git a/elf/dl-reloc.c b/elf/dl-reloc.c index 7cbed38..7e4f499 100644 --- a/elf/dl-reloc.c +++ b/elf/dl-reloc.c @@ -60,10 +60,10 @@ _dl_relocate_object (struct link_map *l, int lazy) = ((void *) l->l_addr + l->l_info[DT_STRTAB]->d_un.d_ptr); - Elf32_Addr resolve (const Elf32_Sym **ref) + Elf32_Addr resolve (const Elf32_Sym **ref, Elf32_Addr r_offset) { return _dl_lookup_symbol (strtab + (*ref)->st_name, ref, scope, - l->l_name); + l->l_name, (*ref)->st_value == r_offset); } real_next = l->l_next; diff --git a/elf/do-rel.h b/elf/do-rel.h index acef25d..9657bc2 100644 --- a/elf/do-rel.h +++ b/elf/do-rel.h @@ -37,7 +37,8 @@ Cambridge, MA 02139, USA. */ static inline void elf_dynamic_do_rel (struct link_map *map, int reltag, int sztag, - Elf32_Addr (*resolve) (const Elf32_Sym **), + Elf32_Addr (*resolve) (const Elf32_Sym **symbol, + Elf32_Addr r_offset), int lazy) { const Elf32_Sym *const symtab @@ -61,7 +62,7 @@ elf_dynamic_do_rel (struct link_map *map, else { if (resolve) - loadbase = (*resolve) (&definer); + loadbase = (*resolve) (&definer, r->r_offset); else { assert (definer->st_shndx != SHN_UNDEF); @@ -173,11 +173,14 @@ extern void _dl_setup_hash (struct link_map *map); reference; it is replaced with the defining symbol, and the base load address of the defining object is returned. SYMBOL_SCOPE is the head of the chain used for searching. REFERENCE_NAME should name the object - containing the reference; it is used in error messages. */ + containing the reference; it is used in error messages. If NOSELF is + nonzero, them *SYM itself cannot define the value; another binding must + be found. */ extern Elf32_Addr _dl_lookup_symbol (const char *undef, const Elf32_Sym **sym, struct link_map *symbol_scope, - const char *reference_name); + const char *reference_name, + int noself); /* List of objects currently loaded. */ @@ -258,8 +258,8 @@ of this helper program; chances are you did not intend to run this program.\n", _dl_sysdep_fatal (_dl_argv[0] ?: "<program name unknown>", ": error in loading shared libraries\n", errobj ?: "", errobj ? ": " : "", - errstring, err ? ": " : NULL, - err ? strerror (err) : NULL, NULL); + errstring, err ? ": " : "", + err ? strerror (err) : "", "\n", NULL); /* Once we return, _dl_sysdep_start will invoke the DT_INIT functions and then *USER_ENTRY. */ diff --git a/sysdeps/i386/dl-runtime.c b/sysdeps/i386/dl-runtime.c index aac5f99..5e4a289 100644 --- a/sysdeps/i386/dl-runtime.c +++ b/sysdeps/i386/dl-runtime.c @@ -64,7 +64,7 @@ _dl_runtime_resolve (Elf32_Word reloc_offset) definer = &symtab[ELF32_R_SYM (reloc->r_info)]; loadbase = _dl_lookup_symbol (strtab + definer->st_name, &definer, - scope, l->l_name); + scope, l->l_name, 0); /* Restore list frobnication done above for DT_SYMBOLIC. */ l->l_next = real_next; |